• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2020	Near Threatened	B1b(ii,iii)
2016	Near Threatened	B1ab(ii,iii,v);C2a(i)
2013	Near Threatened	B1ab(ii,iii,v);C2a(i)
2012	Near Threatened	B1ab(ii,iii,v);C2a(i)
2008	Near Threatened	B1a+b(i,ii,iii,v)
2004	Near Threatened
2000	Lower Risk/Near Threatened
1994	Lower Risk/Near Threatened
1988	Near Threatened

Migratory status	not a migrant	Forest dependency	high
Land-mass type	continent	Average mass	-

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	19,300 km2	medium
Number of locations	11-100	-
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	10000-19999 mature individuals	medium	estimated	2012
Population trend	decreasing	-	suspected	2004-2025
Rate of change over the past 10 years/3 generations (longer of the two periods)	1-9%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	1-19%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	1-9%	-	-	-
Generation length	6.78 years	-	-	-

Population justification: Based on information provided by Lammertink et al. (1996), the the distribution range covers an area of 13,400 km². It is estimated that 65-90% of the species range is occupied by home ranges (M. Lammertink in litt. 2010), resulting in 8,700-12,000 km² of occupied habitat. An estimate of 3 km² per territory is derived from Croisin (1967) by M. Lammertink (in litt. 2010), suggesting that there are 2,900-4,000 groups in total. Each group has two adults and 9.3 individuals (n=7), implying that there are 5,800-8,000 breeding adults within a population of 27,000-37,200 individuals. Based on the supposition that there are more than two mature individuals per group, the population is placed in the band for 10,000-19,999 mature individuals.

Trend justification: Although some populations may be stable, the overall population is suspected to be in slow decline (M. Lammertink in litt. 2010; C. Villar Rodríguez et al. in litt. 2012) owing to the species's susceptibility to forest destruction (Madge and Burn 1993). The rate of decline may accelerate over the next three generations (C. Villar Rodríguez et al. in litt. 2012).

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Mexico	extant	native	yes

Country/Territory	IBA Name
Mexico	Las Bufas
Mexico	Río Presidio - Pueblo Nuevo

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Dry	major	resident
Forest	Subtropical/Tropical Moist Montane	major	resident
Wetlands (inland)	Permanent Rivers/Streams/Creeks (includes waterfalls)	suitable	resident
Altitude	1350 - 2150 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Agro-industry farming	Timing		Scope		Severity		Impact
		Future		Minority (<50%)		Negligible declines		No/Negligible Impact: 2
		Stresses Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture	Annual & perennial non-timber crops - Small-holder farming	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Hunting & trapping terrestrial animals - Intentional use (species is the target)	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Species mortality
Biological resource use	Logging & wood harvesting - Unintentional effects: (large scale) [harvest]	Timing		Scope		Severity		Impact
		Future		Minority (<50%)		Negligible declines		No/Negligible Impact: 2
		Stresses Ecosystem degradation, Ecosystem conversion
Climate change & severe weather	Droughts	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Indirect ecosystem effects, Ecosystem degradation

Purpose	Scale
Sport hunting/specimen collecting	subsistence, national

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Recommended citation
BirdLife International (2024) Species factsheet: Tufted Jay Cyanocorax dickeyi. Downloaded from https://datazone.birdlife.org/species/factsheet/tufted-jay-cyanocorax-dickeyi on 23/11/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 23/11/2024.